Java Tutorial/JSP/XML
Содержание
DOM Parser In JSP
Jsp code
<source lang="java">
<%@ page import="javax.xml.parsers.*, org.xml.sax.*, org.xml.sax.helpers.*, org.w3c.dom.*, java.io.*"
%>
<%! public class xparser {
String displayStrings[] = new String[1000];
int numberDisplayLines = 0;
public String[] displayDocument(String uri)
{
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = null;
try {
db = dbf.newDocumentBuilder();
}
catch (ParserConfigurationException pce) {}
Document document = null;
document = db.parse(uri);
numberDisplayLines = 0;
display(document, "");
} catch (Exception e) {
e.printStackTrace(System.err);
}
return displayStrings;
}
public void display(Node node, String indent)
{
if (node == null) {
return;
}
int type = node.getNodeType();
switch (type) {
case Node.DOCUMENT_NODE: {
displayStrings[numberDisplayLines] = indent;
displayStrings[numberDisplayLines] += "<?xml version=\"1.0\" encoding=\""+
"UTF-8" + "\"?>";
numberDisplayLines++;
display(((Document)node).getDocumentElement(), "");
break;
}
case Node.ELEMENT_NODE: {
displayStrings[numberDisplayLines] = indent;
displayStrings[numberDisplayLines] += "<";
displayStrings[numberDisplayLines] += node.getNodeName();
int length = (node.getAttributes() != null) ? node.getAttributes().getLength() : 0;
Attr attributes[] = new Attr[length];
for (int i = 0; i < length; i++) {
attributes[i] = (Attr)node.getAttributes().item(i);
}
for (int i = 0; i < attributes.length; i++) {
Attr attribute = attributes[i];
displayStrings[numberDisplayLines] += " ";
displayStrings[numberDisplayLines] += attribute.getNodeName();
displayStrings[numberDisplayLines] += "=\"";
displayStrings[numberDisplayLines] += attribute.getNodeValue();
displayStrings[numberDisplayLines] += "\"";
}
displayStrings[numberDisplayLines] += ">";
numberDisplayLines++;
NodeList childNodes = node.getChildNodes();
if (childNodes != null) {
length = childNodes.getLength();
indent += " ";
for (int i = 0; i < length; i++ ) {
display(childNodes.item(i), indent);
}
}
break;
}
case Node.CDATA_SECTION_NODE: {
displayStrings[numberDisplayLines] = indent;
displayStrings[numberDisplayLines] += "<![CDATA[";
displayStrings[numberDisplayLines] += node.getNodeValue();
displayStrings[numberDisplayLines] += "]]>";
numberDisplayLines++;
break;
}
case Node.TEXT_NODE: {
displayStrings[numberDisplayLines] = indent;
String newText = node.getNodeValue().trim();
if(newText.indexOf("\n") < 0 && newText.length() > 0) {
displayStrings[numberDisplayLines] += newText;
numberDisplayLines++;
}
break;
}
case Node.PROCESSING_INSTRUCTION_NODE: {
displayStrings[numberDisplayLines] = indent;
displayStrings[numberDisplayLines] += "<?";
displayStrings[numberDisplayLines] += node.getNodeName();
String text = node.getNodeValue();
if (text != null && text.length() > 0) {
displayStrings[numberDisplayLines] += text;
}
displayStrings[numberDisplayLines] += "?>";
numberDisplayLines++;
break;
}
}
if (type == Node.ELEMENT_NODE) {
displayStrings[numberDisplayLines] = indent.substring(0, indent.length() - 24);
displayStrings[numberDisplayLines] += "</";
displayStrings[numberDisplayLines] += node.getNodeName();
displayStrings[numberDisplayLines] += ">";
numberDisplayLines++;
indent += " ";
}
}
} %> <HTML>
<HEAD> <TITLE>Parsing an XML Document With DOM</TITLE> </HEAD> <BODY>
Parsing an XML Document With DOM
<% xparser p = new xparser();
String[] s = p.displayDocument(application.getRealPath("/") + "test.xml");
for(int i = 0; i < s.length; i++){
if(s[i] != null){
%>
<%= s[i] %>
<%
}
}
%>
</BODY>
</HTML></source>
JSP SAX Parser
Jsp code
<source lang="java">
<%@ page import="org.xml.sax.*, org.xml.sax.helpers.DefaultHandler, javax.xml.parsers.*, java.io.*" %> <%! javax.servlet.jsp.JspWriter localOut; public class parser extends DefaultHandler {
String indent = "";
void parse(String name)
{
DefaultHandler handler = this;
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
SAXParser saxParser = factory.newSAXParser();
saxParser.parse(new File(name), handler);
} catch (Throwable t) {}
}
public void startDocument() throws SAXException
{
try{
localOut.println("<?xml version=\"1.0\" encoding=\""+"UTF-8" + "\"?>
");
}
catch(java.io.IOException e){}
}
public void endDocument() throws SAXException
{
}
public void startElement(String namespaceURI, String localName, String qualifiedName, Attributes attrs)
throws SAXException
{
try{
String elementName = localName;
if ("".equals(elementName)) {
elementName = qualifiedName;
}
localOut.println(indent + "<" + elementName);
if (attrs != null) {
for (int i = 0; i < attrs.getLength(); i++) {
String attributeName = attrs.getLocalName(i);
if ("".equals(attributeName)) attributeName = attrs.getQName(i);
localOut.println(attributeName + "=");
localOut.println("\"" + attrs.getValue(i) + "\"");
}
}
localOut.println(">
");
indent += " ";
}
catch(java.io.IOException e){}
}
public void endElement(String namespaceURI, String localName, String qualifiedName)
throws SAXException
{
try{
String elementName = localName;
if ("".equals(elementName)) {
elementName = qualifiedName;
}
indent = indent.substring(0, indent.length() - 24);
localOut.println(indent + "</" + elementName + ">");
localOut.println("
");
}
catch(java.io.IOException e){}
}
public void characters(char buf[], int offset, int len)
throws SAXException
{
try{
String s = new String(buf, offset, len);
if (!s.trim().equals("")) {
localOut.println(indent + " " + s);
localOut.println("
");
}
}
catch(java.io.IOException e){}
}
} %> <HTML>
<HEAD>
<TITLE>Parsing an XML Document with SAX</TITLE>
</HEAD>
<BODY>
Parsing an XML Document with SAX
<%
localOut = out;
parser p = new parser();
p.parse(application.getRealPath("/") + "test.xml");
%>
</BODY>
</HTML></source>
